Rolling mill



NOV 18, 193 w. F. DETwlLER 1,781,809' ROLLING MILL i Filed bw. 14, 1927 Patented Nov. 18, 1930 UNITED STATES PATENT QFFICE.;

WILLIAM P. LETWILER, oP TARENTUM, PENNSYLVANIA, AssIGNoR 'ro-ALLEGIIIlNr STEEL COMPANY, or BRACKENRILGE, PENNSYLVANIA, A CORPORATION or vPENN- SYLVANIA ROLLING MILL Application led December 14, 1927. Serial 110.239,904.

This invention relates broadly to the art of metal rolling, and more particularly to rolling mills of the character designated in the art as four-high mills.

5 I have found that in the use of four-high mills very desirable results can be obtained with respect to uniformity of rolled product, particularly Where such product is produced by cold rolling, if means is provided for effecting the temperature control of the reducing rolls particularly if means eective, during the rolling o eration, are employed for indicating the e ectiveness of such temperature control.

results With respect to the maintenance of the desired contour of the working pass of a four-high mill can be obtained if a temperature control and indicating means of the character referred to are employed.

In the accompanying drawings I have shown, for purposes of illustration only, certain preferred embodiments of the present invention, it being understood that the drawings do not define the limits of my invention, inasmuch as changes in the construction of the various parts therein disclosed and characteristics of the mill may be made Without departing either from the spirit of my invention or the scope of my broader claims.

In the drawings, the single figure is a front elevational view of a mill constructed in accordance with the present invention.

In accordance with the present invention, there may be provided a four-high mill comrising housings 2 having therein suitable bearings 3 for the necks of backing rolls 4.

Intermediate the backing rolls there are provided reducing rolls 5, the necks 6 of which are mounted in suitable bearings 7 as is well understood in the art. Each of the intermediate reducing rolls is hollow or provided with a bore 8 extending axially therethrough and co-operating at either one or both ends with a conduit 9 through which a cooling fluid or medium, such as water or oil, may be continuously supplied' in amounts controllable by a valve 10 for controlling the tempera-ture of the reducing rolls in the manner desired.

I have also found that very advantageous.

'Co-operating Withthe mill is aseparate frame 11 so mounted as to be independent of any ldimensional changes in the mill housmgs. This frame includes a transversely extending bar 12 serving to support a plurality of gauges `13 having deflection responsive members '.14 in contact With different aligned v vthere ,is provided a continuous visual indication ofthe conditionof'tlie backingroll. Sincevthe condition ofthe backing rolls is, in

large part, a function of temperature changes in the reducing rolls 5', the gauges provide means for accurately ascertaining Whether the supply of temperature controlling medium is to small or toov'grealt.' The operator may .accordingly control the Yvalves t10 to vary the amount of temperatur'econtrolling medium'as may be required.

It will be apparent to those skilled in the art that any desiredv form of roll'y adjusting means, such as a screWdoWn 17, may/be prO-y vided.

An advantage 'of the present invention arises from the provision of means for insuring the maintenance of substantially co'nstant temperature conditions in the Working rolls irrespective of the amount of heat generated therein during rolling.

Still other advantages of the invention arise from the provision of means for indicating, While the mill is in use, the condition of the backing rolls, and particularly where such means is used in combination with means for controlling the temperature of the reducing rolls.

1. In a four-high mill, backing rolls, reducing rolls, means for flowing a temperature controlling fluid through the reducing rolls, and means for indicating changes of deflection which take place in the backing rolls in response to said flow of fluid.

2. In a four-high mill, backing rolls, hollow reducing rolls, means for flowing cooling liquid through said reducing rolls, and means responsive to defiections in one of said backing rolls for indicating `temperature changes in the reducing rolls.

3. In a four-high mill, backing rolls, reducing rolls, and means for indicating changes in contour of a backing roll.

4. In a four-high mill, backing rol-ls, reducing rolls, and means for indicating changes in the contour of a backing roll, said means comprising a plurality of gauges cooperating with such backing roll.

5. In a four-l1igh mill, backing rolls, roducin rolls, and means for indicating changing conditions of temperature in a backing roll, said means comprising a plurality of gauges co-operating with such backing roll, together with a frame supported independently of the mill for co-operation with the gauges.

6. In a four high mill, backing rolls, reducing rolls, means for controlling the temperature of the reducing rolls, and means responsive to deiiections in said backing rolls for indicating variations in the temperature of said reducing rolls.

7. In a four high mill, backing rolls, reducing rolls, means for controlling the temperature of the reducing rolls, and means for indicating Variations in the temperature of said reducing rolls, said means comprising deflection gauges co-operating with a backing roll.

In testimony whereof, I have hereunto subscribed my name this 10th day of December,

W. F. DETWILER. 

